This set is for the 24V Cummins 1998-2002. Intake horns for the 12V 1994-1998 are available. Please check other listings This intake horn is made from 3.5 inch stainless steel and helps smooth the air flow as it enters the intake manifold. Paired with the PQY intake heater block delete this kit removes all the restriction for the charge air. It not only makes performance gains but looks much better too. Kit comes with everything you will need to install it. -3.5 inch Stainless steel intake horn and cold side pipe -(4) M8×1.25×75 bolts -3.5 inch straight silicone coupler -3.5inch 45 degree silicone soupler -(4) 3.5 inch T-bolt clamps